The colorsys module defines bidirectional conversions of
color values between colors expressed in the RGB (Red Green Blue)
color space used in computer monitors and three other coordinate
systems: YIQ, HLS (Hue Lightness Saturation) and HSV (Hue Saturation
Value). Coordinates in all of these color spaces are floating point
values. In the YIQ space, the Y coordinate is between 0 and 1, but
the I and Q coordinates can be positive or negative. In all other
spaces, the coordinates are all between 0 and 1.